Cushman 646442 Owner's Manual page 171

Problem
2. Engine is hard to start (with
start motor running)
3. Engine power is insufficient
(Knocking, vibration, smoke)
Fuel with low cetane used

No operation of solenoid valve

Injection pump malfunctioning

Too high viscosity of engine oil (Improper type of oil)

Incorrect injection of injection nozzle or carbon accumulated onto it

Improper valve clearance

Excessive engine oil (Overfilling, water or hydraulic oil mixed with engi-

ne oil)
Overheated engine

Restricted fuel supply (Clogged filter, water in fuel, loose fuel line, etc.)

Improper fuel, low cetane

Clogged air cleaner

Improper injection timing

check item
9
TROUBLESHOOTING
Maintenance code
N
M,L
H
-
9